---
product_id: 109736612
title: "CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit"
brand: "wadoy"
price: "19275 Ft"
currency: HUF
in_stock: true
url: https://www.desertcart.hu/products/109736612-csr-u2-hard-start-kit-for-3-5-to-5
store_origin: HU
region: Hungary
---

# 35A surge current boost Multi-layer start capacitor Faster compressor startup CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit

**Brand:** wadoy
**Price:** 19275 Ft
**Availability:** ✅ In Stock

## Summary

> ⚡ Start Smart, Save Big — The Ultimate HVAC Power Boost!

## Quick Answers

- **What is this?** CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit by wadoy
- **How much does it cost?** 19275 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/109736612-csr-u2-hard-start-kit-for-3-5-to-5)

## Best For

- wadoy enthusiasts

## Why This Product

- Trusted wadoy brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cut Your Energy Bills:** Lower compressor load means noticeable savings on your electricity costs 💡
- • **Plug & Play Simplicity:** Pre-wired with 3 color-coded wires for effortless, foolproof installation 🎯
- • **Whisper-Quiet Operation:** Operates at just 1 dB, keeping your environment peaceful and professional 🤫
- • **Extend Equipment Lifespan:** Reduce high-amp stress to add years to your compressor and electrical components 🔧
- • **Turbocharge Your AC Start:** Slash compressor startup time with a powerful 35A hard start boost ⚡

## Overview

The CSR-U2 Hard Start Kit by Wadoy is a high-performance HVAC accessory designed for 3.5 to 5 ton AC units. Featuring a robust 35-amp multi-layer capacitor and a smart relay, it accelerates compressor startup, reduces electrical strain, and lowers energy consumption. Pre-wired for quick installation, this kit extends equipment life while operating nearly silently at 1 dB, making it an essential upgrade for efficient, reliable air conditioning.

## Description

CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit

## Features

- ♥ [ PROLONGED EQUIPMENT LIFE ] - This potential relay reduces the amount of time your compressor is on high amp start-up, add years to the life of your compressor and other electrical components associated with your A/C system
- ♥ [ START FASTER ] - Significantly reduces the amount of time it takes for your compressor to start.CSR-U2 start capacitor uses a powerful multi-layer starting capacitor and a smart switch to give the compressor the boost it needs to start up quickly, more reliably and draw less power
- ♥ [ HARD STAR CAPACITOR ] - The Capacitor has been pre-wired for you. There are only 3 color coded wires which need to be connected.The Black wire will be connected to the Common side of the compressor. The Striped wire will be connected to the Start winding of the compressor and the Red wire will be connected to the Run winding of the compressor
- ♥ [ LOWER ELECTRIC BILLS ] - Reduces the load on your compressor & Saves Electricity
- ♥ [ QUALITY GUARANTEE ] - This is Non-Original Aftermarket Parts, but the quality is much better. If you have any problem, please contact us, we will be very happy to help you solve it.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Wadoy |
| Voltage | 240 Volts |
| Recommended Uses For Product | Reduces the load on your compressor & Saves Electricity |
| Power Source | Corded Electric |
| Noise Level | 1 dB |
| Special Feature | Hard Start Kit |
| Included Components | Mounting Screws |
| Item Weight | 0.4 Kilograms |
| Maximum Power | 5 Horsepower |
| Material | Plastic |
| Style | Electric-Powered |
| AC Adapter Current | 35 Amps |
| Motor Horsepower | 5 Horsepower |
| Model Name | CSR U2 |
| Manufacturer | Wadoy |
| UPC | 674043004198 |
| Item Weight | 14 ounces |
| Package Dimensions | 7.83 x 4.02 x 2.68 inches |
| Item model number | CSR U2 |
| Is Discontinued By Manufacturer | No |
| Shape | Round |
| Special Features | Hard Start Kit |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** Wadoy
- **Voltage:** 240 Volts
- **Recommended Uses For Product:** Reduces the load on your compressor & Saves Electricity
- **Power Source:** Corded Electric
- **Noise Level:** 1 dB

## Images

![CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit - Image 1](https://m.media-amazon.com/images/I/61LjJYw4rgL.jpg)

## Questions & Answers

**Q: Is this compatible with a carrier performance - 3.5 ton 16 seer residential air conditioner condensing unit item: 24acc642a003 mfr: 24acc642a003?**
A: This is a universal start assist capacitor kit, it will work on any brand equipment within the rated tonnage.

**Q: Can I install on a 3 ton air conditioner?**
A: I would stick with what the manufacturer of the product recommend  “5-2-1 CSRU1 Compressor Saver for 1 to 3 Ton Units”

**Q: Can you use 2 together on one air conditioner unit ?**
A: No, if one des not work with proper voltage your DONE, new compressor

**Q: Is it supposed to hum after it is installed and powered?**
A: It should not hum. If you hear that recheck your wiring. Check the mfd on the start capacitor and the run/ dual capacitor. The humming could be the compressor trying to start.

## Frequently Bought Together

- CSR-U2 Hard Start kit for 3.5 to 5 Ton Units, HVAC Hard Start Kit for Air Conditioner, AC Hard Start Capacitor Kit
- ATMA SUPPLY CSR-U1 Hard Start Device Compressor Saver for 1- to 3-Ton AC Units
- BOJACK 45+5 uF 45/5 MFD ±6% 370V/440VAC CBB65 Dual Run Circular Start Capacitor for AC Motor Run or Fan Start or Condenser Straight

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-17*